A mains electricity (AC-powered) laboratory instrument intended to be used for the qualitative and/or quantitative in vitro determination of multiple clinical chemistry analytes in a clinical specimen. Analytes detected may include electrolytes, specific proteins, lipids and kidney, liver and/or cardiac function test analytes. The analyser typically requires analyte specific test kits or reagents and incorporates multiple channels using more two or more technologies which may include microfluidics, electrometry, spectrophotometry, fluorimetry, radiometry and/or chemiluminescence. The device operates with minimal technician involvement and complete automation of all procedural steps.